We’ve all seen it: The Post-It on the microwave at work politely demanding that you NOT burn your popcorn -- or else. This site features submitted photos of these frustration-charged notes, where criticism is disguised with a helpful tone. Be aware that some notes have adult language.

Number to Know

21: Percentage of high school students ages 15 to 17 who are holding down a full- or part-time job. – U.S. Census Bureau